The Guy Steele Designing by Accident talk on the history of Scheme is really good (download the slides first). Watch the Gerald Sussman one too (it’s short!). Also, who doesn’t want to know the value of ((call/cc call/cc) (call/cc call/cc))?? Holiday fun for all the family.

This talk on a Scheme documentation language (and DSLs in general) is good also. From last year’s ICFP: